The author developed a new type composite hammer, of which the wear part was made from high CrMn abrasion resisting cast iron and handle was made of low C steel.是什么意思_The author developed a new type composite hammer, of which the wear part was made from high CrMn abrasion resisting cast iron and handle was made of low C steel.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句